The Decays KL → ℓ + ℓ − ℓ '+ ℓ '− Revisited
/ Authors
/ Abstract
The double lepton pair decay modes of the K_L meson are analyzed including all contributions of order p^6 in Chiral Perturbation Theory. The experimentally established e^+ e^- e^+ e^- mode and the recently observed e^+ e^- mu^+ mu^- mode are discussed in detail.
Journal: Physical Review D